As the order was given, the crossbow cannons on the outer wall immediately clanked to life.
Amidst deafening sonic booms, bolts from the Rune Crossbow Cannons, each four to five meters long and as thick as a bucket, shot out. They flew like cannonballs toward the Oak Guardians over two hundred meters away.
BOOM! BOOM!
The Oak Guardians were enormous and conspicuous targets, making them easy to hit without much aiming.
Over thirty giant bolts found their mark; not a single one missed.
Ghastly craters immediately exploded open on the Oak Guardians' bodies.
However, the behemoths paid them no mind. They shook their branches to pull out the giant bolts and continued their slow advance toward the city wall.
With every step forward, the wounds left by the giant bolts healed a little more.
It was clear that the wounds would be completely healed in two or three minutes at most.
Seeing this, the burly man's brow furrowed.
